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General

  • Target

    737d6ccf608a12eee75a0451b10b982db7406a3930b07039103e64802b3e9bbd.exe

  • Size

    852KB

  • Sample

    240517-bzlv2sbb7z

  • MD5

    f658555b9922ffdbadcf27a7cf6a6338

  • SHA1

    b3f0ee363e1f8e2336d20d5eb127e0fb4a8fecad

  • SHA256

    737d6ccf608a12eee75a0451b10b982db7406a3930b07039103e64802b3e9bbd

  • SHA512

    340c779d871441d87360d461ce7d6290deabdc2efd11440d160e85d07bf37b64f845b6ae1c0ccc64b834c53acacc20dbae6dc0cc3e1c7ae1aaa242e42971847a

  • SSDEEP

    24576:zmeb4lTN8+WgtV3+vlpu2ostSDuFMd/GlPb:zv4lq6lss23tSTd/GlP

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ifeanyi@12

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      737d6ccf608a12eee75a0451b10b982db7406a3930b07039103e64802b3e9bbd.exe

    • Size

      852KB

    • MD5

      f658555b9922ffdbadcf27a7cf6a6338

    • SHA1

      b3f0ee363e1f8e2336d20d5eb127e0fb4a8fecad

    • SHA256

      737d6ccf608a12eee75a0451b10b982db7406a3930b07039103e64802b3e9bbd

    • SHA512

      340c779d871441d87360d461ce7d6290deabdc2efd11440d160e85d07bf37b64f845b6ae1c0ccc64b834c53acacc20dbae6dc0cc3e1c7ae1aaa242e42971847a

    • SSDEEP

      24576:zmeb4lTN8+WgtV3+vlpu2ostSDuFMd/GlPb:zv4lq6lss23tSTd/GlP

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables referencing Windows vault credential objects. Observed in infostealers

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • Detects executables referencing many file transfer clients. Observed in information stealers

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks